[Webkit-unassigned] [Bug 79749] New: Determine text direction for rendering a TextTrackCue

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=79749

           Summary: Determine text direction for rendering a TextTrackCue
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Media Elements
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: vcarbune at adobe.com
                CC: eric.carlson at apple.com


This bug represents substeps 10.2, 10.3 used to determine the text direction of the cue text.
http://dev.w3.org/html5/webvtt/#webvtt-cue-text-rendering-rules

"10.2 Apply the Unicode Bidirectional Algorithm's Paragraph Level steps to nodes using the following constraints, to determine the paragraph embedding level of the cue: [BIDI]
* nodes represents a single paragraph.
* The paragraph's text consists of the concatenation of the values of each WebVTT Text Object in nodes, in a pre-order, depth-first traversal, excluding WebVTT Ruby Text Objects and their descendants.

10.3 If the paragraph embedding level determined in the previous step is even (the paragraph direction is left-to-right), let direction be 'ltr', otherwise, let it be 'rtl'."

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